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Remembering ANS member Gil Brown
Brown
The nuclear community is mourning the loss of Gilbert Brown, who passed away on July 11 at the age of 77 following a battle with cancer.
Brown, an American Nuclear Society Fellow and an ANS member for nearly 50 years, joined the faculty at Lowell Technological Institute—now the University of Massachusetts–Lowell—in 1973 and remained there for the rest of his career. He eventually became director of the UMass Lowell nuclear engineering program. After his retirement, he remained an emeritus professor at the university.
Sukesh Aghara, chair of the Nuclear Engineering Department Heads Organization, noted in an email to NEDHO members and others that “Gil was a relentless advocate for nuclear energy and a deeply respected member of our professional community. He was also a kind and generous friend—and one of the reasons I ended up at UMass Lowell. He served the university with great dedication. . . . Within NEDHO, Gil was a steady presence and served for many years as our treasurer. His contributions to nuclear engineering education and to this community will be dearly missed.”
Yoon Sub Sim
Nuclear Technology | Volume 156 | Number 3 | December 2006 | Pages 289-302
Technical Paper | Thermal Hydraulics | doi.org/10.13182/NT06-A3792
Articles are hosted by Taylor and Francis Online.
In a thermal-hydraulic analysis for nuclear application, a one-dimensional analysis is widely used. In the analysis, averaging is required for the calculation of the cell property, and the accuracy of the averaging directly influences the accuracy of a numerical scheme. While the average value depends on the property distribution characteristics in a cell, conventional numerical schemes do not utilize the information. Instead, they rely on the use of a large number of nodes for their accuracy. There are many cases where the use of a large number of nodes is not practically allowed, especially in a transient system analysis, and the calculation results come to suffer from a large truncation error. To overcome the drawbacks of the conventional schemes, a new approach is introduced to reduce the truncation error by utilizing the distribution characteristics in a cell for the required averaging. The new approach places a node point at the boundary of a calculation cell and averaging is achieved from the properties at the inlet and outlet by using weighting factors that are determined from the cell property distribution. By this approach, it was successful to describe more accurately even a transient where the property distribution was stepwise. Steady-state calculation for a once-through steam generator where the feedwater is heated to superheated steam was accurately carried out with only three calculational nodes. The characteristics and achievements of the new approach are described.
